* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
  }

  body {
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
  }

  header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    text-align: center;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
  }

  .welcome-section {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    margin-top: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
  }

  h1 {
    color: #3498db;
    margin-bottom: 20px;
  }

  p {
    margin-bottom: 20px;
    font-size: 18px;
  }

  .btn {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    margin: 10px;
    transition: background-color 0.3s;
  }

  .btn:hover {
    background-color: #2980b9;
  }

  footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 30px;
    color: #7f8c8d;
    font-size: 14px;
  }